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| 型号： | PCA9553DP/01,118 |
| 厂商： | NXP Semiconductors |
| 文件页数： | 8/26页 |
| 文件大小： | 0K |
| 描述： | IC LED DRIVER LINEAR 8-TSSOP |
| 产品培训模块： | LED Controllers I²C Bus Fundamentals |
| 标准包装： | 1 |
| 拓扑： | 开路漏极，PWM |
| 输出数： | 4 |
| 内部驱动器： | 是 |
| 类型 - 主要： | LED 闪烁器 |
| 频率： | 400kHz |
| 电源电压： | 2.3 V ~ 5.5 V |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 8-TSSOP，8-MSOP（0.118"，3.00mm 宽） |
| 供应商设备封装： | 8-TSSOP |
| 包装： | 标准包装 |
| 工作温度： | -40°C ~ 85°C |
| 产品目录页面： | 844 (CN2011-ZH PDF) |
| 其它名称： | 568-3392-6 |
NXP Semiconductors
PCA9553
4-bit I 2 C-bus LED driver with programmable blink rates
7.4 Pins used as general purpose I/Os
LED pins not used to control LEDs can be used as general purpose I/Os.
For use as input: Set LEDn to high-impedance (01) and then read the pin state via the
Input register.
For use as output: Connect external pull-up resistor to the pin and size it according to the
DC recommended operating characteristics. LED output pin is HIGH when the output is
programmed as high-impedance, and LOW when the output is programmed LOW through
the ‘LED selector’ register. The output can be pulse-width controlled when PWM0 or
PWM1 are used.
7.5 Power-on reset
When power is applied to V DD , an internal Power-On Reset (POR) holds the PCA9553 in
a reset condition until V DD has reached V POR . At that point, the reset condition is released
and the PCA9553 registers are initialized to their default states, with all outputs in the OFF
state. Thereafter, V DD must be lowered below 0.2 V to reset the device.
8. Characteristics of the I 2 C-bus
The I 2 C-bus is for 2-way, 2-line communication between different ICs or modules. The two
lines are a serial data line (SDA) and a serial clock line (SCL). Both lines must be
connected to a positive supply via a pull-up resistor when connected to the output stages
of a device. Data transfer may be initiated only when the bus is not busy.
8.1 Bit transfer
One data bit is transferred during each clock pulse. The data on the SDA line must remain
stable during the HIGH period of the clock pulse as changes in the data line at this time
will be interpreted as control signals (see Figure 8 ).
SDA
SCL
data line
stable;
change
of data
Fig 8.
Bit transfer
data valid
allowed
mba607
8.1.1 START and STOP conditions
Both data and clock lines remain HIGH when the bus is not busy. A HIGH-to-LOW
transition of the data line while the clock is HIGH is de?ned as the START condition (S). A
LOW-to-HIGH transition of the data line while the clock is HIGH is de?ned as the STOP
condition (P) (see Figure 9 ).
PCA9553_6
? NXP B.V. 2008. All rights reserved.
Product data sheet
Rev. 06 — 29 December 2008
8 of 26
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相关代理商/技术参数 |
参数描述 |
|---|---|
| PCA9553DP02 | 制造商:PHILIPS 制造商全称:NXP Semiconductors 功能描述:4-bit I2C LED driver with programmable blink rates |
| PCA9553TK | 制造商:PHILIPS 制造商全称:NXP Semiconductors 功能描述:4-bit I2C-bus LED driver with programmable blink rates |
| PCA9553TK,118 | 功能描述:LED照明驱动器 4BIT I2C FM OD LED RoHS:否 制造商:STMicroelectronics 输入电压:11.5 V to 23 V 工作频率: 最大电源电流:1.7 mA 输出电流: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:SO-16N |
| PCA9553TK/02 | 制造商:PHILIPS 制造商全称:NXP Semiconductors 功能描述:4-bit I2C-bus LED driver with programmable blink rates |
| PCA9553TK/02,118 | 功能描述:LED照明驱动器 LED DRVR 4Segment 2.5V/3.3V/5V 8-Pin RoHS:否 制造商:STMicroelectronics 输入电压:11.5 V to 23 V 工作频率: 最大电源电流:1.7 mA 输出电流: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:SO-16N |
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